Barrón, who performs under the name “Eddy Barrón," began releasing music videos and songs on Spotify last year in coordination with the Mexican military. His lyrics extol the army’s virtues ...

MEXICO CITY — At a Mexican military base, Captain Eduardo Barrón picks up not a rifle but a microphone. Swaying boot-to-boot, he belts out a song as the sounds of trumpets and accordions roar ...